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      1 /*
      2  * This file is part of the internal font implementation. It should not be included by anyone other than
      3  * FontMac.cpp, FontWin.cpp and Font.cpp.
      4  *
      5  * Copyright (C) 2006, 2007, 2008, 2009 Apple Inc.
      6  *
      7  * This library is free software; you can redistribute it and/or
      8  * modify it under the terms of the GNU Library General Public
      9  * License as published by the Free Software Foundation; either
     10  * version 2 of the License, or (at your option) any later version.
     11  *
     12  * This library is distributed in the hope that it will be useful,
     13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     15  * Library General Public License for more details.
     16  *
     17  * You should have received a copy of the GNU Library General Public License
     18  * along with this library; see the file COPYING.LIB.  If not, write to
     19  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     20  * Boston, MA 02110-1301, USA.
     21  *
     22  */
     23 
     24 #include "config.h"
     25 #include "FontPlatformData.h"
     26 
     27 #include "PlatformString.h"
     28 #include <ApplicationServices/ApplicationServices.h>
     29 #include <WebKitSystemInterface/WebKitSystemInterface.h>
     30 #include <wtf/HashMap.h>
     31 #include <wtf/RetainPtr.h>
     32 #include <wtf/Vector.h>
     33 #include <wtf/text/StringHash.h>
     34 
     35 using std::min;
     36 
     37 namespace WebCore {
     38 
     39 static inline USHORT readBigEndianWord(const BYTE* word) { return (word[0] << 8) | word[1]; }
     40 
     41 static CFStringRef getPostScriptName(CFStringRef faceName, HDC dc)
     42 {
     43     const DWORD cMaxNameTableSize = 1024 * 1024;
     44 
     45     static HashMap<String, RetainPtr<CFStringRef> > nameMap;
     46 
     47     // Check our hash first.
     48     String faceString(faceName);
     49     RetainPtr<CFStringRef> result = nameMap.get(faceString);
     50     if (result)
     51         return result.get();
     52 
     53     // We need to obtain the PostScript name from the name table and use it instead,.
     54     DWORD bufferSize = GetFontData(dc, 'eman', 0, NULL, 0); // "name" backwards
     55     if (bufferSize == 0 || bufferSize == GDI_ERROR || bufferSize > cMaxNameTableSize)
     56         return NULL;
     57 
     58     Vector<BYTE> bufferVector(bufferSize);
     59     BYTE* buffer = bufferVector.data();
     60     if (GetFontData(dc, 'eman', 0, buffer, bufferSize) == GDI_ERROR)
     61         return NULL;
     62 
     63     if (bufferSize < 6)
     64         return NULL;
     65 
     66     USHORT numberOfRecords = readBigEndianWord(buffer + 2);
     67     UINT stringsOffset = readBigEndianWord(buffer + 4);
     68     if (bufferSize < stringsOffset)
     69         return NULL;
     70 
     71     BYTE* strings = buffer + stringsOffset;
     72 
     73     // Now walk each name record looking for a Mac or Windows PostScript name.
     74     UINT offset = 6;
     75     for (int i = 0; i < numberOfRecords; i++) {
     76         if (bufferSize < offset + 12)
     77             return NULL;
     78 
     79         USHORT platformID = readBigEndianWord(buffer + offset);
     80         USHORT encodingID = readBigEndianWord(buffer + offset + 2);
     81         USHORT languageID = readBigEndianWord(buffer + offset + 4);
     82         USHORT nameID = readBigEndianWord(buffer + offset + 6);
     83         USHORT length = readBigEndianWord(buffer + offset + 8);
     84         USHORT nameOffset = readBigEndianWord(buffer + offset + 10);
     85 
     86         if (platformID == 3 && encodingID == 1 && languageID == 0x409 && nameID == 6) {
     87             // This is a Windows PostScript name and is therefore UTF-16.
     88             // Pass Big Endian as the encoding.
     89             if (bufferSize < stringsOffset + nameOffset + length)
     90                 return NULL;
     91             result.adoptCF(CFStringCreateWithBytes(NULL, strings + nameOffset, length, kCFStringEncodingUTF16BE, false));
     92             break;
     93         } else if (platformID == 1 && encodingID == 0 && languageID == 0 && nameID == 6) {
     94             // This is a Mac PostScript name and is therefore ASCII.
     95             // See http://developer.apple.com/textfonts/TTRefMan/RM06/Chap6name.html
     96             if (bufferSize < stringsOffset + nameOffset + length)
     97                 return NULL;
     98             result.adoptCF(CFStringCreateWithBytes(NULL, strings + nameOffset, length, kCFStringEncodingASCII, false));
     99             break;
    100         }
    101 
    102         offset += 12;
    103     }
    104 
    105     if (result)
    106         nameMap.set(faceString, result);
    107     return result.get();
    108 }
    109 
    110 void FontPlatformData::platformDataInit(HFONT font, float size, HDC hdc, WCHAR* faceName)
    111 {
    112     LOGFONT logfont;
    113     GetObject(font, sizeof(logfont), &logfont);
    114     m_cgFont.adoptCF(CGFontCreateWithPlatformFont(&logfont));
    115 }
    116 
    117 FontPlatformData::FontPlatformData(HFONT hfont, CGFontRef font, float size, bool bold, bool oblique, bool useGDI)
    118     : m_syntheticBold(bold)
    119     , m_syntheticOblique(oblique)
    120     , m_orientation(Horizontal)
    121     , m_textOrientation(TextOrientationVerticalRight)
    122     , m_size(size)
    123     , m_widthVariant(RegularWidth)
    124     , m_font(RefCountedGDIHandle<HFONT>::create(hfont))
    125     , m_cgFont(font)
    126     , m_isColorBitmapFont(false)
    127     , m_useGDI(useGDI)
    128 {
    129 }
    130 
    131 FontPlatformData::~FontPlatformData()
    132 {
    133 }
    134 
    135 void FontPlatformData::platformDataInit(const FontPlatformData& source)
    136 {
    137     m_font = source.m_font;
    138     m_cgFont = source.m_cgFont;
    139     m_useGDI = source.m_useGDI;
    140 }
    141 
    142 const FontPlatformData& FontPlatformData::platformDataAssign(const FontPlatformData& other)
    143 {
    144     m_font = other.m_font;
    145     m_cgFont = other.m_cgFont;
    146     m_useGDI = other.m_useGDI;
    147 
    148     return *this;
    149 }
    150 
    151 bool FontPlatformData::platformIsEqual(const FontPlatformData& other) const
    152 {
    153     return m_font == other.m_font
    154         && m_cgFont == other.m_cgFont
    155         && m_useGDI == other.m_useGDI;
    156 }
    157 
    158 }
    159